供应 Pacific止回阀

旋启式止回阀用于防止管路系统发生反向流。 它们适用于水平或竖直（仅限于向上流经阀门）安装的管路走向。旋启式止回阀具有低压降特性，**适合中等流速的介质应用。 旋启式止回阀的正确选型很重要（请参见第20页技术规格表）。管线流速太低，或者流速过高，都会损伤阀门内件，缩短阀门的使用寿命。 应避免管路系统出现快速和频繁的反向流、脉动或紊流的工况。将旋启式止回阀在管路系统中换一个位置安装，通常能减轻或排除以上工况所造成的问题。

Pacific® Bolted Bonnet Cast Steel Swing Check Valves

Swing check valves are used to prevent flow reversal in piping systems.

They are suitable for service in horizontal or vertical (flow up through valve only) piping runs. Swing check valves have low pressure drop and are best suited for moderate velocity applications.

Correct sizing of swing check valves is important (see page 20 of technical datasheet). Either too low a line velocity or too high a velocity can damage valve internals and shorten valve life.

Service in systems involving rapid and frequent flow reversals, pulsation or turbulent flow should be avoided. Relocating swing check valves within the piping system can often minimize or eliminate problems caused by this type of application.